<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>let 命令</title>
<script>
 // 声明式函数获取名称
 function foo() {}
 console.log(foo.name); // foo

 // 匿名函数获取名称
 var func = function () {};
 console.log(func.name); // func
 </script>
 </head>
 <body></body>
 </html>